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        <meta name="description" content=".indexOf(字符串,开始查找位置)检索字符串首次出现的位置 如果要检索的字符串值没有出现，则该方法返回 -1.substr(start)在字符串中抽取从 start 下标开始的指定数目的字符。.split(分隔符，返回的数组中的字串不包括分隔符自身)分割字符串12345678910111213">
    

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                    <h1>字符串方法</h1>
                    
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                            2016-11-06
                        
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                <p>.indexOf(字符串,开始查找位置)检索字符串首次出现的位置 如果要检索的字符串值没有出现，则该方法返回 -1<br>.substr(start)在字符串中抽取从 start 下标开始的指定数目的字符。<br>.split(分隔符，返回的数组中的字串不包括分隔符自身)分割字符串<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div></pre></td><td class="code"><pre><div class="line">&lt;script type=&quot;text/javascript&quot;&gt;</div><div class="line">var str=&quot;How are you doing today?&quot;</div><div class="line">document.write(str.split(&quot; &quot;) + &quot;&lt;br /&gt;&quot;)</div><div class="line">document.write(str.split(&quot;&quot;) + &quot;&lt;br /&gt;&quot;)</div><div class="line">document.write(str.split(&quot; &quot;,3))</div><div class="line">//输出：</div><div class="line">How,are,you,doing,today?</div><div class="line">H,o,w, ,a,r,e, ,y,o,u, ,d,o,i,n,g, ,t,o,d,a,y,?</div><div class="line">How,are,you</div><div class="line"></div><div class="line">&quot;2:3:4:5&quot;.split(&quot;:&quot;)	//将返回[&quot;2&quot;, &quot;3&quot;, &quot;4&quot;, &quot;5&quot;]</div><div class="line">&quot;|a|b|c&quot;.split(&quot;|&quot;)	//将返回[&quot;&quot;, &quot;a&quot;, &quot;b&quot;, &quot;c&quot;]</div><div class="line">&lt;/script&gt;</div></pre></td></tr></table></figure></p>
<p>#############################<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div></pre></td><td class="code"><pre><div class="line">//获取url传入参数(get 方式)</div><div class="line"> function getUrl()&#123;</div><div class="line">     var getUrl = &#123;&#125;;</div><div class="line">     var str = window.location.href;  //http://182.254.146.100:3000/api/getcategorybyid?categoryid=0&amp;pageid=1;</div><div class="line">     var num = str.indexOf(&apos;?&apos;); //能够拿到?所在的索引</div><div class="line">     var str = str.substr(num+1);//categoryid=0&amp;hehe=5</div><div class="line">     var strsz = str.split(&apos;&amp;&apos;);//[&apos;categoryid=0&apos;,&apos;hehe=5&apos;];</div><div class="line">     for(var i=0;i&lt;strsz.length;i++)&#123;</div><div class="line">         var item = strsz[i];  //&apos;categoryid=0&apos;</div><div class="line">         var itemsz = strsz[i].split(&apos;=&apos;); //[&apos;categoryid&apos;,&apos;0&apos;]</div><div class="line">         getUrl[itemsz[0]] = itemsz[1];</div><div class="line">     &#125;</div><div class="line">     return getUrl;</div><div class="line"> &#125;</div></pre></td></tr></table></figure></p>


                
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